From patchwork Fri Nov 18 18:46:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mat Martineau X-Patchwork-Id: 13048612 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 538C3C433FE for ; Fri, 18 Nov 2022 18:46:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235438AbiKRSqT (ORCPT ); Fri, 18 Nov 2022 13:46:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242538AbiKRSqQ (ORCPT ); Fri, 18 Nov 2022 13:46:16 -0500 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B37108FB02 for ; Fri, 18 Nov 2022 10:46:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668797175; x=1700333175; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=W4JEU4Lb4cxuCiSU7pc8DfutGIIeuWjfS0GfiBOJA8E=; b=KUzLZkaB3zrXcctIZtEyYBdqVW/oF1XxuYOOp8sQqSTrglKZe124tnaP np3Oo91ilW2DHMGMx6yJhyXg2ZpIW9a3Zisgk86Dp1mCpLEhMy2MeENfJ HggaIzRWTQRd54x1F8CTmIEJQN5NX6gjlggdKt55rcGmvV3HbO6lsI9QG YjtaIykgwkgreWHmkslqZVlmSZULSbSRzfn3KeL61YPOkEM/efy9L0FLo p5ZJgpCytwSCukPwFFIRBOlVpV3hWU+Pm5F9g1eq9y95QixKhAvT458zx 19ZFQIOVWb7EkYEnV33ZaFHlK0mrhV2aPmLgEGN0oYYWUa228PwF4DeNG A==; X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="375342843" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="375342843" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:14 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="746102229" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="746102229" Received: from mjenkins-mobl.amr.corp.intel.com (HELO mjmartin-desk2.intel.com) ([10.209.47.242]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:14 -0800 From: Mat Martineau To: netdev@vger.kernel.org Cc: Paolo Abeni , davem@davemloft.net, kuba@kernel.org, edumazet@google.com, matthieu.baerts@tessares.net, mptcp@lists.linux.dev, Mat Martineau Subject: [PATCH net-next 2/2] mptcp: more detailed error reporting on endpoint creation Date: Fri, 18 Nov 2022 10:46:08 -0800 Message-Id: <20221118184608.187932-3-mathew.j.martineau@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> References: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Paolo Abeni Endpoint creation can fail for a number of reasons; in case of failure append the error number to the extended ack message, using a newly introduced generic helper. Additionally let mptcp_pm_nl_append_new_local_addr() report different error reasons. Reviewed-by: Mat Martineau Signed-off-by: Paolo Abeni Signed-off-by: Mat Martineau --- include/net/genetlink.h | 3 +++ net/mptcp/pm_netlink.c | 24 +++++++++++++----------- 2 files changed, 16 insertions(+), 11 deletions(-) diff --git a/include/net/genetlink.h b/include/net/genetlink.h index d21210709f84..ed4622dd4828 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -125,6 +125,9 @@ static inline void genl_info_net_set(struct genl_info *info, struct net *net) #define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG((info)->extack, msg) +#define GENL_SET_ERR_MSG_FMT(info, msg, args...) \ + NL_SET_ERR_MSG_FMT((info)->extack, msg, ##args) + /* Report that a root attribute is missing */ #define GENL_REQ_ATTR_CHECK(info, attr) ({ \ struct genl_info *__info = (info); \ diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index fdf2ee29f762..d66fbd558263 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -912,10 +912,14 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet, */ if (pernet->next_id == MPTCP_PM_MAX_ADDR_ID) pernet->next_id = 1; - if (pernet->addrs >= MPTCP_PM_ADDR_MAX) + if (pernet->addrs >= MPTCP_PM_ADDR_MAX) { + ret = -ERANGE; goto out; - if (test_bit(entry->addr.id, pernet->id_bitmap)) + } + if (test_bit(entry->addr.id, pernet->id_bitmap)) { + ret = -EBUSY; goto out; + } /* do not insert duplicate address, differentiate on port only * singled addresses @@ -929,8 +933,10 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet, * endpoint is an implicit one and the user-space * did not provide an endpoint id */ - if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT)) + if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT)) { + ret = -EEXIST; goto out; + } if (entry->addr.id) goto out; @@ -1016,16 +1022,12 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk, addrlen = sizeof(struct sockaddr_in6); #endif err = kernel_bind(ssock, (struct sockaddr *)&addr, addrlen); - if (err) { - pr_warn("kernel_bind error, err=%d", err); + if (err) return err; - } err = kernel_listen(ssock, backlog); - if (err) { - pr_warn("kernel_listen error, err=%d", err); + if (err) return err; - } return 0; } @@ -1329,13 +1331,13 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info) if (entry->addr.port) { ret = mptcp_pm_nl_create_listen_socket(skb->sk, entry); if (ret) { - GENL_SET_ERR_MSG(info, "create listen socket error"); + GENL_SET_ERR_MSG_FMT(info, "create listen socket error: %d", ret); goto out_free; } } ret = mptcp_pm_nl_append_new_local_addr(pernet, entry); if (ret < 0) { - GENL_SET_ERR_MSG(info, "too many addresses or duplicate one"); + GENL_SET_ERR_MSG_FMT(info, "too many addresses or duplicate one: %d", ret); goto out_free; }